CVE-2019-1721: Cisco Expressway Series and Cisco TelePresence Video Communication Server Denial of Service Vulnerability
First published: Thu Apr 18 2019(Updated: )
A vulnerability in the phone book feature of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to cause the CPU to increase to 100% utilization, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to improper handling of the XML input. An attacker could exploit this vulnerability by sending a Session Initiation Protocol (SIP) message with a crafted XML payload to an affected device. A successful exploit could allow the attacker to exhaust CPU resources, resulting in a DoS condition. Manual intervention may be required to recover the device. This vulnerability is fixed in Cisco Expressway Series and Cisco TelePresence Video Communication Server Releases X12.5.1 and later.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco TelePresence Video Communication Server | <x12.5.1 |
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Reference Links
Frequently Asked Questions
What is CVE-2019-1721?
CVE-2019-1721 is a vulnerability in the phone book feature of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) that can cause a denial of service (DoS) condition.
How does CVE-2019-1721 affect Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS)?
CVE-2019-1721 affects Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) by causing a 100% CPU utilization, resulting in a denial of service (DoS) condition.
What is the severity of CVE-2019-1721?
The severity of CVE-2019-1721 is high with a CVSS score of 6.5.
How can I fix CVE-2019-1721?
To fix CVE-2019-1721, it is recommended to apply the relevant security patches or updates provided by Cisco.
Where can I find more information about CVE-2019-1721?
More information about CVE-2019-1721 can be found on the security advisories released by Cisco.
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